A cluster of thunderstorms dropped 3 to 6 inches of rain on parts of north central Wisconsin during the early morning of June 22. This caused flooding, which washed out some roads and culverts.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS ARX wrote it up.
A cluster of thunderstorms dropped 3 to 6 inches of rain on parts of north central Wisconsin during the early morning of June 22. This caused flooding, which washed out some roads and culverts. In addition, heavy rain caused a large part of the back yard of a home near Perkinstown to erode into a lake.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS La Crosse, WI wrote its last area forecast discussion before the first event at Jun 22, 2:09 AM CST, 2 hours 21 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LA CROSSE WI 309 AM CDT MON JUN 22 2009 .SHORT TERM...TODAY THROUGH WEDNESDAY NIGHT MAIN FORECAST CONCERN IS ON TEMPERATURES AND HEAT INDEX VALUES TODAY AND TUESDAY AND THEN RAIN CHANCES TONIGHT THROUGH WEDNESDAY NIGHT. 07Z SURFACE ANALYSIS SHOWS WEAK LOW PRESSURE OVER SOUTHERN MINNESOTA...WITH WARM FRONT EXTENDING SOUTHEAST TROUGH NORTHEAST IOWA AND NORTHERN ILLINOIS. CONVECTION DEVELOPED ALONG THIS BOUNDARY LAST EVENING BECOMING TORNADIC FOR A FEW HOURS OVER SOUTHERN MINNESOTA. RADAR SHOWING THESE STORMS HAVE WEAKENED AND ARE MOVING ACROSS CENTRAL AND WESTERN WISCONSIN. INFRARED SATELLITE IMAGERY SHOWS CLEAR SKIES ACROSS MUCH OF IOWA WITH BACK EDGE OF CLOUDS NOW MOVING THROUGH SOUTHEAST MINNESOTA AND NORTHEAST IOWA. HEIGHTS BUILD ACROSS THE UPPER MISSISSIPPI RIVER VALLEY TODAY AS UPPER RIDGE ACROSS THE CENTRAL CONUS EXPANDS NORTHWARD. 22.00Z NCEP DETERMINISTIC MODELS IN GOOD AGREEMENT THROUGH THE PERIOD. AS RIDGE BUILDS NORTHWARD MAIN BAND OF WESTERLIES SUPPRESSED TO NEAR THE CANADIAN BORDER. AS IMPULSES MOVE THROUGH THE MEAN FLOW THEY BEGIN TO FLATTEN THE RIDGE BY MID WEEK AND AS THE HIGH RETROGRADES TOWARD THE DESERT SOUTHWEST ON THURSDAY...FLOW OVER THE REGION BECOME MORE NORTHWESTERLY. WEAKENING LOW LEVEL JET INTO SOUTHERN WISCONSIN WILL HELP SUPPORT CONVECTION FOR THE EARLY MORNING HOURS...BUT AS HEIGHTS BUILD ALOFT EXPECT MOSTLY SUNNY SKIES AND HOT TEMPERATURES. BOTH GFS AND NAM SHOWING +20 TO +23 DEGREE CELSIUS 850MB TEMPERATURES ACROSS THE REGION FOR MONDAY AND TUESDAY. THIS WILL GIVE US THE WARMEST TEMPERATURES OF THE SEASON SO FAR. WITH THE MOIST LOW LEVELS HUMID CONDITIONS WILL ALSO BE THE RULE. THE WARMEST DAY LOOKS TO BE TUESDAY AS A WEAK BOUNDARY PUSHES INTO MINNESOTA AND GOOD COMPRESSIONAL WARMING OUT AHEAD OF IT ACROSS THE FORECAST AREA. WILL LIKELY SEE TEMPERATURES IN THE UPPER 80S TO LOWER 90S TODAY AND THE LOWER TO MIDDLE 90S TUESDAY. SOME LOCATIONS ON TUESDAY MAY REACH HEAT ADVISORY CRITERIA...ESPECIALLY ACROSS THE SOUTH HALF. WILL HOLD OFF ON ANY HEADLINES AT THIS POINT AND HIT HARD IN THE HAZARDOUS WEATHER OUTLOOK. CONVECTIVE POTENTIAL LOOKS TO BE MINIMAL THROUGH TUESDAY AS AREA SHOULD REMAIN CAPPED THROUGH MUCH OF THE PERIOD. ALTHOUGH HAVE MAINTAINED THE LOWER END POPS ACROSS THE FAR WEST TONIGHT FOR THE POSSIBILITY OF DECAYING CONVECTION FROM THE PLAINS MAKING IT THIS FAR EAST. CONVECTION MORE LIKELY INTO THE AREA TUESDAY NIGHT AND WEDNESDAY AS SHORTWAVE FLATTENS RIDGE ALLOWING FOR A WEAK SURFACE BOUNDARY TO PUSH INTO MINNESOTA TUESDAY NIGHT AND THEN DROP ACROSS THE AREA WEDNESDAY. AS FOR SEVERE THREAT...TUESDAY NIGHT MAIN CAPE AXIS OF 2000-3000 J/KG AND DEEP SHEAR RESIDES OVER MINNESOTA JUST NORTHWEST OF THE AREA. ON WEDNESDAY..WEAK BOUNDARY DROPS ACROSS THE FORECAST AREA...BUT QUESTION WILL BE AMOUNT OF CLOUDS AND HOW MUCH INSTABILITY THERE WILL BE. .LONG TERM...THURSDAY THROUGH SUNDAY SUMMER PATTERN TO CONTINUE IN THIS TIME FRAME AS LARGE SUB TROPICAL HIGH REMAINS OVER THE SOUTHERN CONUS...WITH THE MAIN BAND OF WESTERLIES ACROSS THE NORTHERN TIER OF STATES. BOTH THE 22.00Z GFS AND ECMWF SHOW SHORTWAVE RIDGING TO BUILD ACROSS THE AREA THURSDAY..WITH WEAK SURFACE BOUNDARY TO THE SOUTH. NEXT WAVE THEN DROPS ACROSS THE AREA LATER IN THE WEEK AND CURRENT GRIDDED DATABASE HAS LOWER END POPS IN THESE TIME FRAMES TO ACCOUNT FOR THESE WAVES. THUS HAVE MADE NO CHANGES TO THIS TIME FRAME. && .AVIATION... SHRA/TSRA WILL CONTINUE TO EXIT OFF TO THE EAST OF THE TAF SITES EARLY THIS MORNING. MOIST/UNSTABLE BOUNDARY LAYER AIRMASS WILL REMAIN IN PLACE THROUGH THE PERIOD...BUT MAIN FORCING FOR SHRA/TSRA WILL BE EAST OF THE TAF SITES THIS MORNING...THEN WEST/NORTH OF THEM TONIGHT. MAIN AVIATION CONCERNS WILL BE SOME PATCHY MVFR/IFR CIGS/ VSBYS EARLY THIS MORNING AND PATCHY MVFR VSBYS IN HAZE THIS AFTERNOON/EVENING...MVFR/IFR VSBYS IN FOG LATER TONIGHT INTO TUE MORNING. WESTERLY WINDS AT AND ABOVE 850MB WILL BRING A DRIER MID/ UPPER LEVEL AIRMASS TO THE AREA TODAY BUT THE LOWER LEVELS WILL REMAIN QUITE MOIST. WEAK GRADIENT WINDS OVER THE AREA TODAY/TONIGHT AND CLEAR/MOSTLY CLEAR SKIES WILL BE FAVORABLE FOR PERSISTENCE OF SOME HAZE TODAY AND FOG FORMATION TONIGHT. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...NONE. MN...NONE. IA...NONE. && SHORT/LONG TERM...RABERDING AVIATION...RRS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LA CROSSE WI 515 AM CDT MON JUN 22 2009 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029- 032>034-041>044-053>055-061-231100- ADAMS-ALLAMAKEE-BUFFALO-CHICKASAW-CLARK-CLAYTON-CRAWFORD-DODGE- FAYETTE-FILLMORE-FLOYD-GRANT-HOUSTON-HOWARD-JACKSON-JUNEAU- LA CROSSE-MITCHELL-MONROE-MOWER-OLMSTED-RICHLAND-TAYLOR-TREMPEALEAU- VERNON-WABASHA-WINNESHIEK-WINONA- 515 AM CDT MON JUN 22 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF SOUTHEAST MINNESOTA... NORTHEAST IOWA...AND SOUTHWEST INTO CENTRAL WISCONSIN. .DAY ONE...TODAY AND TONIGHT A THUNDERSTORM OR TWO MAY LINGER ALONG AND EAST OF INTERSTATE 94 THIS MORNING. ANY OF THESE STORM ARE NOT EXPECTED TO BE SEVERE. THE COMBINATION OF HIGHS IN THE MID 80S TO LOWER 90S AND DEW POINTS IN THE UPPER 60S TO LOWER 70S WILL SEND AFTERNOON HEAT INDICES INTO THE 90 TO 100 DEGREE RANGE. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS LATE TONIGHT...ROUGHLY WEST OF A LINE FROM LAKE CITY MINNESOTA TO DECORAH AND FAYETTE IOWA. DUE TO LIMITED INSTABILITY AND WEAKER WINDS ALOFT...ANY POTENTIAL STORMS LATER TONIGHT ARE NOT EXPECTED TO BECOME SEVERE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY SUMMER HEAT AND HUMIDITY WILL BUILD EVEN MORE FOR TUESDAY. THE HEAT COULD BECOME OPPRESSIVE...ESPECIALLY TUESDAY AFTERNOON WHEN HEAT INDICES ARE EXPECTED TO CLIMB INTO THE 95 TO 105 DEGREE RANGE FOR SOME LOCATIONS. AN APPROACHING FRONTAL BOUNDARY WILL BRING A CHANCE OF THUNDERSTORMS TO LOCATIONS WEST AND NORTH OF LA CROSSE TUESDAY NIGHT...WHERE THERE IS A SLIGHT RISK OF SEVERE STORMS TUESDAY NIGHT. THE MAIN THREATS BEING LARGE HAIL AND DAMAGING WINDS. THE FRONT WILL DROP SOUTH THROUGH THE AREA WITH CHANCES OF THUNDERSTORMS WEDNESDAY AND WEDNESDAY NIGHT...BUT IT REMAINS TOO EARLY TO DETERMINE THE THREAT OF SEVERE WEATHER WITH ANY OF THESE STORMS. THUNDERSTORM CHANCES RETURN FOR THE WEEKEND. WHILE ITS TOO EARLY TO DETERMINE THE SEVERE WEATHER THREAT...THE VERY WARM AND MOIST AIRMASS EXPECTED TO BE OVER THE REGION WOULD CERTAINLY SUPPORT THE POTENTIAL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT. SPOTTERS MIGHT BE NEEDED AT SOME POINT FROM LATE TUESDAY NIGHT INTO WEDNESDAY NIGHT BUT CONFIDENCE IN THE DETAILS REMAINS LOW AT THIS TIME. .EMERGENCY MANAGEMENT COORDINATION... NO CALL IS SCHEDULED. RRS
The national radar mosaic for the moment the first event began.
2 flood, 1 heavy rain. Local standard time, as filed.
Flooding was reported along County Road M, which closed one lane. There were also reports of washouts in some nearby backyards. In fact, a large part of a back yard of a residence near the intersection of County Road E and M was washed into a lake.
Several culverts and roads were washed out in the township of Hammel.
A rainfall amount of 3.51 inches was reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2009Every state in 2009This day in weather historyWarnings in Wisconsin, June 2009
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 167668, 167669, 167670.